Furnace-regulator unit



April 10, 192s. 1,665,599

A. H. MCCULLOCH FURNACE REGULATOR UNIT Filed March 16, 192 2 Sheets-Sheet l u h--\//- L 12 Vez? for 5 April 1o, 192s.

A. H. MCCULLOCH FURNACE REGULATOR UNIT Filed March 16, 1927 l2 sheets-sheer a In Venzor Patented Apr. 10, 1928.

UNITED STATES ALFRED H. MGCULIOCH, 0F BOSTON,MASSAGHUSETTS.

FURNACE-REGULATOR UNIT.

Application filed March 16, 1927. Serial No. 175,723.

The invention to be hereinafter described relates to a damper and air-inlet regulator unit for application to the pipe for conducting the gases of combustion from afurnace to the chimney.

In Letters Patent of the United States No. 1,615,021, granted to me January 18, 1927, is disclosed a good `form ofV damper and air-inlet regulator unit comprising a collar for application tothe pipe, a diskshaped damper for location inthe pipe, a head on the collar having an opening, and diametrically opposed segmental shaped wings on the same shaft which ,carries the damper. The construction is such that when the damper is adjusted to open posi tion for full draft` from the furnace, one of the wings .will cover the'opening in the head, and when the damper is adjusted to closed position, said Wing will uncover the opening in the head, thereby to allow air in the cellar in which the furnace is located,

to enter the pipe through the opening. Thereis no opening in the head at the furnace side of the damper, so the noxious and injurious gases coming from the furnace can not escape into the cellar and rise up through the building to the discomfort of the occupants thereof.

Under certain conditions it may be desirable to provide. a more ample air inlet opening for the unit when the damper is in closed position. A purpose of the present invention, therefore, is to provide the unit with a register and a chamber constructed to permit more air to pass through the unit, but without loss of substantial advantages of the unit set forth in said patent.

Another purpose `of thel invention is to provide the unit with arpartition projecting fromthe head toward the damper and having an edge curved substantially to conform to thecontour of the damper, the construction being such that when the damper is closed, its/effectiveness in checking the fire is increased.

Still another purpose of the invention is to provide the unit with a register` plate having air-inlet apertures therein adapted to be covered and uncovered by Wingsywhich are movable with the damper, the construction being such that the register plate may be adjusted to locate the apertures therein in different positions with relation to the head'. i v

With tho aforesaid and other purposes in View, the character of the invention-may be best understood by reference to the following description of an embodiment thereof shown in the accompanying drawings, wherein:

Fig. 1 is a perspective view of the damper and air-inlet regulator unit applied to a pipe shown in dot-and-dash lines; y j

Fig. 2 is a transverse section through the unit and the pipe; Fig. 3 isa perspective view ofk unassembled parts of the unit; 4

Fig. 41 is a front View of the unit showing the register plate in a position in which the apertures therein extend partly over the head and partly over the opening between the head and the collar; and

Fig. 5 is a side elevation of the unit and a transverse section through the pipe, and showing the unit provided with` a handle for adjusting the damperand register.

Referring to the drawings, the `damper and air-inlet regulator unit shown therein as one good form of the invention, cornprises a collar 1 curved to conform to the contour of the pipe 3 and having a flange '5 connected by stove bolts 7 with the marginal portion of the pipe surrounding a hole cut in the pipe and kof a size conforming toV the collar.

The collar is provided with a head 9in the present instanceof an area substantially equal to half of the collar. This head is located in somewhat from the outer edge of theV collar, and has a projection 13 provided with a short bearing 15. The collar is formed to providea ledge 17 within and extending throughout the inner circumference of the collar.y Lugs 19 project from the head to the ledge and have notches 21 at the ends thereof for a purpose to 4be def scribed. edge of the head is a partition 23 having a curved inner edge 25. The collar, flange, head and partitionrare preferably made in asingle casting. A

Mounted in the be'aringl is a shaft 27 having mating spliced parts 29 and 31. The part 29 has a tongue 3,3 (Fig. 3) adapted to enter a notch 35 in the part 31, and the latter has a tongue 37 adapted to enter the notch 39 in the part29. These tongues and notches serve to hold the parts inproper alinement. The parts are secured to ether b j `a Cotter pinlfl. Formed intera with tie shaft part 29 is a disirshapeil damper Projecting rearwardly from the j the lugs 65 to` escape from the notches 21 in which they wereV located. Then the registerl plate is turned through an arc of 900 to bring the lugs in registration with the other pair of notches 2l. "The wing sleeve isv `turned through an arc of 900, and the cotter pin 4l is inserted through bores 91 inthe sleeve which are set at right angles to the bores which formerly received the Cotter pin, I The weighted arm is replaced on the` shaft in proper position to tend to turn the wings to positions,k for covering the register plate apertures, and the cotter pin 55 is inserted through the shaft tohold the arm thereon. Under some conditions it may be desirable to employ a handle instead of a weighted arm for turning Vthe shaft. To accomplish this, the weighted arm and the shaft part 3l may be removed, and a handle 9i (Fig. 5) having a shaft part 93 may be inserted into the wing sleeve to take the place ofthe shaft part 31. t

` When the damper lis closed and the wings uncover-the apertures in the register plate, air may freely pass through said apertures into the ipe at the chimney side of the damper. y he chamber between the head and the register plate provides an ample passage for the air. The partition between the head and the damper prevents. gases from the furnace from escaping through the register plate apertures into the cellar. A desirable feature of the construction is the provision of the two bearings in the head and plate a substantial distance apart, thereby serving reliably to maintain the damper in proper position in the pipe.

The parts of the unit are simple, cheap and strong in construction, and quickly and easily assembled. The unit may be applied. to a horizontal or a vertical pipe or to one having any inclination.

lt will be understood that the invention is not limited to the constructionshown, and that various deviations may be made therefrom without departing from the spirit and scope of the appended claims.

What is claimed is:

1. A damper and air-inlet regulator unit for application to the pipe for conduct-ing gases of combustion from a furnace, comprising a collar curved to conform to the contour of the pipe and adapted for attachment thereto, a head located in from the outer edge of the collar and formed to provide an air-inlet opening,.a register plate on the outer edge of the collar, spaced from the head and having an aperture therein, said head and plate having bearings, a shaft projecting through said bearings, a damper on the shaft for regulating the draft through the pipe, a wing plate on the shaft adapted to be moved by the shaft to cover and uncover the plate aperture, and a member on the shaft for turning the same to adjust the damper and wing plates, said air inlet open-- ing beingwholly at one side of the axis of said shaft. f

2. A damper and air-inlet regulator unit for application to the pipe for conducting gases of combustionfrom the furnace, comprising a collar curved toconform to the contour of the pipe and adaptedfor attachment thereto, a head yin the collar located in from the outer edge of the collar and formed t to provide an air-inlet opening, a bearing on said head, a shaftV 1n said bearingga damper on'the shaft, a partition -m the collarprojecting from the head nearly to the damper and curved to conform to the latter, a register plate having air-inlet apertures therein,

on the outer edge of the collar and opposed to and spaced from` the head, an air-inlet chamber between the head and lplate,` thel latter having aperture to admit air to said opening and chamber, said head and plate having bearings, a shaft in said bearings, a damper on the shaft, a member on and moved by the shaft to cover and uncover the register plate aperture, and means for turning said shaft, said air inlet opening being wholly at one side of the axis of said shaft.

4. A damper and air-inlet regulator unit for application to the pipe for conducting gases of combustion from a furnace, comprising a collar adapted for attachment to the pipe, a head in the collar formed to provide an air-inlet opening, a partition projecting rearward from the head, said collar, head and partition being in the form of a single casting, a register plate on the collar having apertures therein, a sleeve having wings for covering and uncovering said apertures, said head and plate having bearings, a shaft in said bearings connected to said sleeve, and a damper on the shaft.

5. A damper and air-inlet regulator unit for application to the pipe for conducting gases of combustion from a furnace, comprising a collarL adapted for attachment to the pipe, a head in the collar formed to provide an air-inlet opening, a bearing in the head, a shaft in the bearing having mating spliced parts, each having a tongue entering a notch in the other for alining said parts, a damper on one of said parts, and an operating member on the other of said parts.

6. A damper and air-inlet regulator` unit `for application to the pipe for conductingy gases of combustion from a furnace, compris'ing a collar adaptedfor attachment't'o the pipe,a head in the Vcellar located-in from the outer edge of the collar formed to provide an ajiIr-inlletopening, Ia register plate 'on the collar outward from said `head and having apertures therein, one over the head and vthe other l'over the Opening, said head and plate hav-ing bearings, a shaft in said `bearings, a damper on the shaft, a sleeve yon and moved by the shaft and having Wings for covering and 'uncovering said apertu-res,and an operating meinber for the shaft, said inlet opening being Wholly "at one side of the "axis of'said shaft. Y i

7. A damper and air-inlet regulator unit for application to the pipe for conducting gases of combustion from `a furnace, comprising a `collar adapted for attachment to the pipe, a head in' the collar formed to pro'- vide an airainlet "opening-,a register plate having solid portions and a pair'offapertures, said plate being adjustablel to" aposition in which' one of apertures is Wholly over the `'head and adjustable to 'a position in which both of.'saidapertnresare partly V'over the head, 'bearings on said head and plate, a shaft in said bearings, a damper 'on the shaft, `and alsleeve connected to the shaft having 'Wings foi` coveri'ng'and uncover-'ing im said apertures.

igeeaeee 8. A damper and air-inlet regulator-'unit for application to the pipe lfor 'conducting 4gases of combustion from a furnace, cornprising a collar adapted for attachmentto 'the pipe, a led-ge on the collaradja'cent the outer edge thereof, a head in Vthe collar formed to provide an air-inlet Opening, Aa register plate seated on the ledge Aand hav- -ing airi'nlet `'apertures therein, bearings "on the head and plate, a shaft inthe hearings', Wings lconnected to the shaft for covering and uncovering the apertures, adamp'er on one end of the shaft, and an operating vinember `on the other 'end of the shaft.

9. A damper and air-inlet regulator fnit for 'application to the pipe for conducting gases 'of combustion froin a "furnace,` comprising 'a lcollar adapted for attachment to the pipe, a head in the collar formed to provide an a'irii"ilet opening, 'an apertil-red register plate on the ycellar spaeedeutWard from the head, a Wing plate on the register plate, Said head, register plate 'and `Wing ,plate hav-ing registering holes therein, 'a shaft `project-ing through said holes, and a damper 0n said shaft, the Avlatter having means for holding the head, register p-lat'e and Wing plate in assembled relation.

ALFRED afi/toenemen 

